Trolley



C. AALBORG.

TROLLEY.

APPLICATION FILED'FEB.19, 1914.

Patented Mar. 30, 1920.

5 'NVENTO a r 17W BY I ATTORNEY UNITED STATES PATENT OFFICE.

CHRISTIAN AALBORG, O15 WILKINSBURG, PENNSYLVANIA, .ASSIG-NOR TO WESTING- HOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

TROLLEY.

Specification of Letters Patent.

Patented Mar. 30, 1920.

To all whom it may concern Be it known that I, CHRISTIAN Aancone, a citizen of the United States, and a resi dent of ld ilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a. new and useful Improvement in Trolleys, of which the following is a specification.

My invention relates to current-collecting devices for electric vehicles, and it has special reference to trolleys of the pantograph type which are particularly adapted for high-speed operation and for transmitting relatively large amounts of current from. trolley conductors to electric vehicles.

One of the objects of my invention is to provide a device of the above indicated type, that shall be inexpensive, simple and rugged in construction, and adapted for effective and reliable operation and one that shall embody a plurality of pivotally and resiliently mounted contact shoes which are independently and separately supported upon a pantograph frame in such manner that the device shall not be rendered inoperative, even though one of the contact shoes be disabled.

Heretofore, when pantograph trolleys comprising a plurality of pivotallymounted contact shoes have been employed, the shoes have been acted upon by springs which have served in common to perform their intended functions, and, moreover, the shoes have been mounted upon a. single pivotal support. In such structures, the shoes may be tilted only with respect to each other and, moreover, because of the common spring support, they are rendered mutually dependent upon each other, and all become inoperative, if one shoe or one spring becomes disabled.

It is to overcome these difiiculties that my invention is intended, and, in accordance therewith, I provide a. structure in which the several contact shoes are entirely independent, as regards both means of support and operation.

In the accompanying drawing, Figure 1 is a view in side elevation of a portion of a structure constructed in accordance with my invention, and Fig. 2 is a plan view oi a portion of the structure shown in Fig. l, certain parts being removed for the sake of clearness.

Referring to the drawing, the apparatus here shown conuarises a pantogra-ph supporting frame 1, an operating means 2 therefor, a latch 3 for retaining the pantograph in its lowered position, a plurality of pivotal sup ports or studs 4:, 5, 6 and 7 associated with the pantograph frame, a plurality of supporting arms 8, 9, 10 and 11, which are adapted to serve in pairs for pivotally supporting a. plurality of contact shoes 14 and 15, a plurality of coil springs 16, 17, 18 and 19 severally disposed around the pivotal supports and adapted to cooperate with the arms hereinbetore mentioned, a plurality of slotted members 21 and 21 for cooperating with said springs, and flexible conducting strips 3 L interposed between, the. outer sides of shoes 14; and 15 and members oi the pantograph frame.

The pantogra'ph supporting fral'ue 1 and the operating mechanism 2 may be of any well known type ot construction and pertain only indirectly to my invention. The frame 1, however, preferably embodies a plurality of rods 22, 23, 24 and 25 which; have their upper ends rigidly associated with members or castings 26, 27, 28 and 29. The end castings or members 27 and 28 are of like construction, and each embodies a projecting arm which is adapted to surround a cross rod 31, while each of the end castings 26 and 29 embodies a pair of arms which are spaced apart and adapted to straddle the arms 30 and to surround the cross rod All of the end members 26, 27, E28 and 29 are provided with pairs of upwardly projecting lugs 33 which are adapted to carry the pivotal supports or studs 4, 5, 6 and 7.

Arms 8, 9, 10 and 11 are severally pivo tally mounted upon the respective studs fl:, 5, 6 and 7, and project in pairs outwardly to pivot-ally support the contact shoes 1&- and 15. The coil springs 16, 17, 18 and 19 severally surround the respective studs 4:, 5, 6 and 7 and have free ends bearing upwardly against the under sides of arms 8, 9, 10 and 11 and tending to independently rotate the arms in an upward direction, whereby the shoes 14 and 15 are resiliently pressed against a trolley eonductor (not shown) under operating conditions. The pairs of studs 4: and 5, and 6 and 7 are associated with the members 21 and 21 which are slotted in order to permit of relative horizontal movement bev 3 embody any ing upon said tween the studs and serve the purpose of retaining the otherwise free ends of the springs 16, 17, 18 and 19. p

- The contact shoes let and 15 and the latch that is familiar to those skilled in the art. -It Will be 'notedthat, by reason of the construction shown and described, the several contact shoes 1i and '15 are entirely independent, both. with respect to structure and operation.

Modifications may be made which differ materially in point'of structural details and arrangement and location of parts without departing from the spirit and scope of my invention, and I desire that only such L limitations shall be imposed as are indicatedin the appended claims.

' :1 claim as my lllVGHtlOIli.

1. In a pantograph trolley, the combination-with a pantograph p I frame, .of a pluralityiof trolley shoes, and means for yield ingly supporting each of said shoes upon said frame comprising pivot members mounted on said frame, arms pivoted on said pivot members for supporting said shoes, springs exerting an'upward pressure on saidarms, and links connecting the pivot members of. the several shoes, said springs being attached to the links adjacent thereto. 2. The combination with a movable pane tograph supporting frame, a plurality of pivotal supports associated with the respective halves of said frame and adapted for parallel. movement with respect to each other, of a plurality of independently supported. members pivotally mounted upon said pivotal supports, springs severally actmembers, and .a means cooperating with bothhalves of said frame and engaging said springs.

3. A trolley for electric vehicles embodyrality of pivotal supports associated with the respective halves thereof and adapted for. substantially horizontal parallel 1novement, a plurality of contact shoes mounted uponsaid pivotal supports, a plurality of coilsprings surrounding said pivotalsupport-sandacting upon said shoes, and a plurality of members cooperating with the supports on the respective sides of said pantograph frame and adapted to be engaged by said springs. I v

i ,4. A trolleyfor electric vehicles comprising a movable pantograph supporting suitable construction springs associated with ing. apantograph supporting frame, a plu-,

frame, a plurality of pivotal supports associated with the respective sides thereof, slotted members cooperating with said pivotal supports, a plurality of arms and coil said pivotal supports, the springs being adapted to engage said slotteot members, and a plurality of contact shoes severally pivotally supported upon pairs of said arms.

5. A trolley for electric vehicles embodying a movable pantograph supporting frame, a plurality of pivotal supports mounted on said frame, a plurality of con.- tact shoes mounted upon said supports, a plurality of coil springs surrounding said supports and acting upon said shoes, and link members mounted on said supports and engaging said springs in pairs.

6. A trolley for electric vehicles (aimprising a movable pantograph supporting frame, a plurality of pivotal supports mounted on said frame, a plurality of arms mounted on said pivotal supports, a plurality of link members extending between said supports, a plurality of spring members adapted to engage said arms and said link members, and a plurality of contact shoes pivot-ally supported upon said arms.

7. A pantograph trolley comprising a frame, a plurality of substantially oppositely extending parallel arms pivotally mounted upon said frame, a link extending between the supports for said arms, resilient means engaging said link and tending to raise said arms, and a plurality of currentcollecting shoes pivotally mounted upon said arms.

8. A trolley for electric vehicles embodying asupporting frame, a plurality of pairs of pivotal supports mounted on said frame, a plurality of relatively movable arms mounted on said supports, a link member extending between the supports of each pair, aplurality of springs mounted on said supports and engaging said link members and adapted to resiliently support said arms, and a plurality of contact shoes severally pivotally mounted upon pairs of said arms.

In testimony whereof, I have hereunto subscribed my nan'ie this 13th day of Feb, 1914.

CHRISTIAN AALBORG.

lVitncsses:

S. E. FENY, B. B. HINES. 

